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Leases - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Leases Disclosure [Line Items]      
Rent expense under all operating leases $ 514,287 $ 460,093 $ 424,096
Net book value of property and equipment under capital leases $ 261,960 $ 197,344  
Minimum      
Leases Disclosure [Line Items]      
Facilities leased under non-cancellable operating leases term range, minimum 5 years    
Facilities leased under non-cancellable operating leases renewal option range, minimum 5 years    
Maximum      
Leases Disclosure [Line Items]      
Facilities leased under non-cancellable operating leases term range, minimum 15 years    
Facilities leased under non-cancellable operating leases renewal option range, minimum 10 years